Matematika

Pertanyaan

Log (3×+2)-2log×=1-log(5×-3)

1 Jawaban

  • log(3x+2) - logx^2=log10 - log(5x-3)
    log(3x+2)/x^2 = log 10/5x-3
    3x+2/x^2 = 10/5x-3
    10x^2=(3x+2)(5x-3)
    10x^2=15x^2+x-6
    15x^2-10x^2+x-6=0
    5x^2+x-6=0
    5x^2-5x+6x-6=0
    5x(x-1)+6(x-1)=0
    (5x+6)(x-1)=0
    x=-6/5 atau x=1

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